Lewis, C.A. and Reimer, P.J. and Reimer, R.W. (2008) Marine reservoir corrections: St. Helena, South Atlantic Ocean. Radiocarbon, 50 (2). pp. 275-280. ISSN 0033-8222
Official URL: http://digitalcommons.library.arizona.edu/holdings...
We present the first marine reservoir age and ∆R determination for the island of St. Helena using marine mollusk radiocarbon dates obtained from an historical context of known age. This represents the first marine reservoir age and ∆R determination in the southern Atlantic Ocean within thousands of kilometers of the island. The depletion of 14C in the shells indicates a rather larger reservoir age for that portion of the surface Atlantic than models indicate. The implication is that upwelling old water along the Namibian coast is transported for a considerable distance, although it is likely to be variable on a decadal timescale. An artilleryman’s button, together with other artifacts found in a midden, demonstrate association of the mollusk shells with a narrow historic period of AD 1815–1835.
|Additional Information:||An erratum appeared in Radiocarbon Vol. 50 (3) December 2008, p. 471. It is appended at the end of this article|
|Uncontrolled Keywords:||St Helena; St. Helena; Saint Helena; radiocarbons; radiocarbon dating; radiocarbon dates; marine reservoir age; reservoir effect; surface ocean; reservoir ages; marine mollusks; mollusks; shells; foraminifera; middens; midden deposits; Patella caerulea; limpets; lime; limestone; St. Helena Artillery; southeastern Atlantic; southern Atlantic Ocean; Atlantic; upwelling; currents; Banks Valley; Namibia|
|Subjects:||Y Unknown > Subjects to be assigned|
|Divisions:||Faculty > Faculty of Science > Geography|
|Deposited By:||INVALID USER|
|Deposited On:||28 Aug 2008|
|Last Modified:||06 Jan 2012 16:19|
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